皮皮学，免费搜题
登录
搜题
【单选题】
HIV致病的关键因素是A.
可发生各种肿瘤而致死
B.
HIV易发生变异，避免免疫系统攻击
C.
可合并各种类型的机会感染
D.
侵犯TH细胞，造成严重的免疫缺陷
E.
HIV基因可以和宿主基因整合
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Which could best be substituted for the word 'THIS' in the last sentence of the second paragraph?
A.
The search of Japan's Tokugawa shoguns for solvency.
B.
The unfairness of the tax structure in eighteenth-century Japan.
C.
The difficulty experienced by both individual samurai and the shogun himself in extricating themselves from debt.
D.
The difficulty of increasing government income by other means.
【单选题】根据《规则》第十八条的规定__。1机动船在航时应当给从事捕鱼的船舶让路;2帆船在航时应给从事捕鱼的船舶让路;3从事捕鱼的船舶在航时应当给机动船让路;4从事捕鱼的船舶在航时应当给帆船让路。
A.
①②
B.
①④
C.
②③
D.
①②③④
相关题目：